Problème avec Gridview

.Net 2.0/3.5 sur Visual Studio 2010 - Windows Vista

Bonjour,

J'ai un gridview qui contient un bouton de type "select" (je l'ai nommé "Link"). Lorsque je click sur Link, je suis incapable d'obtenir le contenu d'une cellule de la rangée sélectionnée. J'ai pris le code directement sur MSDN et ca ne fonctionne pas. J'ai essayé beaucoup d'autres trucs mais sans succès.

L'évènement:

Code:

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protected void GridView1_SelectedIndexChanged(Object sender, EventArgs e)
    {
        GridViewRow row = GridView1.SelectedRow;
        string message = "You selected " + row.Cells[2].Text + ".";
    }

est lancé, l'objet row est bien actualisé mais le row.Cells[2].Text est vide!

.aspx

Code:

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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="GridViewInsertEditUpdateDelete.aspx.cs" Inherits="GridViewInsertEditUpdateDelete" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
    <title>Untitled Page</title>
</head>
<body>
 
 
    <form id="form1" runat="server">
 
        <br />
        <asp:Label ID="Label9" runat="server" Text="Project"></asp:Label>
        : &nbsp;
        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        <br />
 
    <div >
    <br />
 
 
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /></div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <div>
            <asp:Panel ID="Panel1" runat="server" Width="989px" Wrap="true">
             <asp:GridView ID="GridView1"   runat="server" AutoGenerateColumns="False" DataKeyNames="softwareRequirementId" 
        OnRowCancelingEdit="GridView1_RowCancelingEdit" 
        OnRowDataBound="GridView1_RowDataBound" OnRowEditing="GridView1_RowEditing" OnRowUpdating="GridView1_RowUpdating" 
        OnRowCommand="GridView1_RowCommand" 
            Onselectedindexchanged="GridView1_SelectedIndexChanged" Onselectedindexchanging="GridView1_SelectedIndexChanging" 
        ShowFooter="True" OnRowDeleting="GridView1_RowDeleting" 
        EnableModelValidation="True" Width="100%"> 
 
        <Columns> 
 
 
 
          <asp:TemplateField HeaderText="Id"  SortExpression="softwareRequirementId"> <EditItemTemplate> 
          <asp:TextBox ID="txtsoftwareRequirementId"  runat="server"  Text='<%# Eval("softwareRequirementId") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewsoftwareRequirementId" runat="server"></asp:TextBox> </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label2" runat="server" Text='<%# Bind("softwareRequirementId") %>'></asp:Label> 
        </ItemTemplate> 
            <ControlStyle BackColor="GhostWhite" Font-Bold="True" Width="100px" />
              <FooterStyle Width="100px" />
            <HeaderStyle BackColor="Beige" Width="100px" />
              <ItemStyle Width="100px" ForeColor="#0099FF" />
        </asp:TemplateField> 
 
 
        <asp:TemplateField HeaderText="Project"  SortExpression="projectId"> <EditItemTemplate> 
          <asp:TextBox ID="txtprojectId" columns="1"  runat="server" Text='<%# Eval("projectId") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewprojectId" runat="server"></asp:TextBox> </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label3" runat="server" Text='<%# Bind("projectId") %>'></asp:Label> 
        </ItemTemplate> 
            <ControlStyle BackColor="GhostWhite" Font-Bold="True" Width="100px" />
            <HeaderStyle BackColor="Beige" Width="100px" />
        </asp:TemplateField> 
 
        <%--<asp:TemplateField HeaderText="Elevate" ShowHeader="True"> 
            <EditItemTemplate> 
               <asp:LinkButton ID="LinkElevate" runat="server" CausesValidation="True" CommandName="elevate" Text="Elevate"></asp:LinkButton> 
            </EditItemTemplate>
            <HeaderStyle BackColor="Tan" />
 
        </asp:TemplateField> --%>
 
        <asp:ButtonField  ButtonType="Button" CommandName="elevate" Text="Button" />
 
 
 
        <asp:TemplateField HeaderText="Section" SortExpression="section"> <EditItemTemplate> 
          <asp:TextBox ID="txtsection" columns="1"  runat="server" Text='<%# Eval("section") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewsection" runat="server"></asp:TextBox> </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label4" runat="server" Text='<%# Bind("section") %>'></asp:Label> 
        </ItemTemplate> 
            <HeaderStyle BackColor="Tan" />
        </asp:TemplateField> 
 
 
 
        <asp:TemplateField HeaderText="rowNumber"> 
        <EditItemTemplate> 
          <asp:TextBox ID="txtrowNumber" runat="server" Text='<%# Bind("rowNumber") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewrowNumber" runat="server" ></asp:TextBox> 
        </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label5" runat="server" Text='<%# Bind("rowNumber") %>'></asp:Label> 
        </ItemTemplate> 
            <HeaderStyle BackColor="Tan" />
        </asp:TemplateField> 
 
 
 
        <asp:TemplateField HeaderText="softwareRequirement" > 
        <EditItemTemplate> 
          <asp:TextBox ID="txtsoftwareRequirement" TextMode="multiline" columns="50" runat="server" Text='<%# Bind("softwareRequirement") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewsoftwareRequirement" runat="server" ></asp:TextBox> 
        </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label6" runat="server" Text='<%# Bind("softwareRequirement") %>'></asp:Label> 
        </ItemTemplate> 
            <HeaderStyle BackColor="Tan" />
        </asp:TemplateField> 
 
 
 
        <asp:TemplateField HeaderText="isTraced" SortExpression="isTraced"> 
        <EditItemTemplate> 
          <asp:TextBox ID="txtisTraced" runat="server" Text='<%# Bind("isTraced") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewisTraced" runat="server" ></asp:TextBox> 
        </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label7" runat="server" Text='<%# Bind("isTraced") %>'></asp:Label> 
        </ItemTemplate> 
            <HeaderStyle BackColor="Tan" />
        </asp:TemplateField> 
 
 
 
 
        <asp:TemplateField HeaderText="image" > 
        <EditItemTemplate> 
          <asp:TextBox ID="txtimage" runat="server" Text='<%# Bind("image") %>'></asp:TextBox> 
        </EditItemTemplate> 
        <FooterTemplate> 
          <asp:TextBox ID="txtNewimage" runat="server" ></asp:TextBox> 
        </FooterTemplate> 
        <ItemTemplate> 
          <asp:Label ID="Label8" runat="server" Text='<%# Bind("image") %>'></asp:Label> 
        </ItemTemplate> 
            <HeaderStyle BackColor="Tan" />
        </asp:TemplateField> 
 
 
 
 
        <asp:TemplateField HeaderText="Edit" ShowHeader="False"> 
            <EditItemTemplate> 
                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="True" CommandName="Update" Text="Update"></asp:LinkButton> 
                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="Cancel" Text="Cancel"></asp:LinkButton> 
 
 
            </EditItemTemplate> 
 
            <FooterTemplate> 
                <asp:LinkButton ID="LinkButton2" runat="server" CausesValidation="False" CommandName="AddNew" Text="Add New"></asp:LinkButton> 
            </FooterTemplate> 
 
            <ItemTemplate> 
                <asp:LinkButton ID="LinkButton1" runat="server" CausesValidation="False" CommandName="Edit" Text="Edit"></asp:LinkButton> 
 
            </ItemTemplate> 
 
            <HeaderStyle BackColor="Tan" />
 
        </asp:TemplateField> 
 
 
        <asp:CommandField HeaderText="Delete" ShowDeleteButton="True" ShowHeader="True" >
            <HeaderStyle BackColor="Tan" />
        </asp:CommandField> 
 
 
 
            <asp:ButtonField CommandName="Select" HeaderText="Link" ShowHeader="True" 
                Text="Link" />
 
 
 
        </Columns> 
</asp:GridView> 
 
            </asp:Panel>
        </div>
    </form>
</body>
</html>

.aspx.cs

Code:

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
 
 
public partial class GridViewInsertEditUpdateDelete : System.Web.UI.Page
{
    private string projectId;
    SoftwareRequirementsCls softwareRequirements = new SoftwareRequirementsCls();
    ProjectCls projects = new ProjectCls();
 
 
    protected void Page_Load(object sender, EventArgs e)
    {
        UrlParameterPasser urlWrapper = new UrlParameterPasser();
        projectId = Request.QueryString["projectId"];
 
        if (!IsPostBack)
        {
 
            DataTable dtProjects = projects.Fetch(projectId);
 
            foreach (DataRow row in dtProjects.Rows)
            {
                TextBox2.Text = row["projectName"].ToString();   
            }
 
            FillSoftwareRequirementsInGrid();
        }
 
 
 
    }
 
    private void FillSoftwareRequirementsInGrid()
    {
        DataTable dtSoftwareRequirements = softwareRequirements.Fetch(projectId);
 
        if (dtSoftwareRequirements.Rows.Count > 0)
        {
            GridView1.DataSource = dtSoftwareRequirements;
            GridView1.DataBind();
        }
        else
        {
            dtSoftwareRequirements.Rows.Add(dtSoftwareRequirements.NewRow());
            GridView1.DataSource = dtSoftwareRequirements;
            GridView1.DataBind();
 
            int TotalColumns = GridView1.Rows[0].Cells.Count;
            GridView1.Rows[0].Cells.Clear();
            GridView1.Rows[0].Cells.Add(new TableCell());
            GridView1.Rows[0].Cells[0].ColumnSpan = TotalColumns;
            GridView1.Rows[0].Cells[0].Text = "No Record Found";
        }
    }
 
 
 
    protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName.Equals("AddNew"))
        {
            TextBox txtNewsoftwareRequirementId = (TextBox)GridView1.FooterRow.FindControl("txtNewsoftwareRequirementId");
            TextBox txtNewprojectId = (TextBox)GridView1.FooterRow.FindControl("txtNewprojectId");
            TextBox txtNewsection = (TextBox)GridView1.FooterRow.FindControl("txtNewsection");
            //DropDownList cmbNewsection = (DropDownList)GridView1.FooterRow.FindControl("cmbNewsection");
            TextBox txtNewrowNumber = (TextBox)GridView1.FooterRow.FindControl("txtNewrowNumber");
            TextBox txtNewsoftwareRequirement = (TextBox)GridView1.FooterRow.FindControl("txtNewsoftwareRequirement");
            TextBox txtNewisTraced = (TextBox)GridView1.FooterRow.FindControl("txtNewisTraced");
            TextBox txtNewimage = (TextBox)GridView1.FooterRow.FindControl("txtNewimage");
 
            softwareRequirements.Insert(projectId, txtNewsection.Text, txtNewrowNumber.Text, txtNewsoftwareRequirement.Text, txtNewisTraced.Text, txtNewimage.Text);
            FillSoftwareRequirementsInGrid();
        }
 
        if (e.CommandName.Equals("Edit"))
        {
 
 
        }
 
        if (e.CommandName.Equals("Link"))
        {
 
 
 
            //UrlParameterPasser urlWrapper = new UrlParameterPasser("linkToSysReq.aspx");
 
            //urlWrapper["softwareRequirementId"] = GridView1.Rows[index].Cells[0].Text;
            //urlWrapper["projectId"] = GridView1.Rows[index].Cells[1].Text;
            //urlWrapper.PassParameters();     
 
        }
        else if (e.CommandName.Equals("elevate"))
        {
            //int index = Convert.ToInt32(e.CommandArgument);
 
            //GridView1.Rows[index].Cells[2].Text = "4";
 
            //string a = GridView1.Rows[index].Cells[2].Text;
 
            //int softwareRequirementId = Convert.ToInt32(GridView1.Rows[index].Cells[3].Text);
 
             //GridViewRow row = GridView1.SelectedRow;
 
             //int a = row.RowIndex;
 
            //string sec = txtNewsection.Text;
 
 
            //int softwareRequirementId = Convert.ToInt32(GridView1.Cells[0].Text);
            //int a = Convert.ToInt32(GridView1.Rows[index].Cells[3].Text);
            //int a++;
            //GridView1.Rows[index].Cells[1].Text = a.ToString();
        }
 
 
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {
 
                //    DropDownList cmbType = (DropDownList)e.Row.FindControl("cmbsection");
 
            //if (cmbType != null)
            //{
            //    try
            //    {
            //        cmbType.DataSource = softwareRequirements.FetchSectionType();
            //        cmbType.DataBind();
            //        cmbType.SelectedValue = GridView1.DataKeys[e.Row.RowIndex].Values[0].ToString();
            //    }
            //    catch (Exception err)
            //    {
            //        //TextBox1.Text = "Error reading list of names. ";
            //        //TextBox1.Text += err.Message;
            //    }
            //}
 
 
 
 
 
 
 
        }
 
        //if (e.Row.RowType == DataControlRowType.Footer)
        //{
        //    //DropDownList txtNewisTraced = (DropDownList)e.Row.FindControl("cmbNewsection");
        //    //txtNewisTraced.DataSource = softwareRequirements.FetchSectionType();
        //    //txtNewisTraced.DataBind();
        //}
    }
    protected void GridView1_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        GridView1.EditIndex = -1;
        FillSoftwareRequirementsInGrid();
    }
    protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
        softwareRequirements.Delete(Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0].ToString()));
        FillSoftwareRequirementsInGrid();
    }
    protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
    {
        GridView1.EditIndex = e.NewEditIndex;
        FillSoftwareRequirementsInGrid();
 
 
 
    }
 
    protected void GridView1_SelectedIndexChanged(Object sender, EventArgs e)
    {
 
 
        GridViewRow row = GridView1.SelectedRow;
        string message = "You selected " + row.Cells[2].Text + ".";
 
 
    }
 
    protected void GridView1_SelectedIndexChanging(Object sender, GridViewSelectEventArgs e)
    {
 
        // Get the currently selected row. Because the SelectedIndexChanging event
        // occurs before the select operation in the GridView control, the
        // SelectedRow property cannot be used. Instead, use the Rows collection
        // and the NewSelectedIndex property of the e argument passed to this 
        // event handler.
        GridViewRow row = GridView1.Rows[e.NewSelectedIndex];
 
        // You can cancel the select operation by using the Cancel
        // property. For this example, if the user selects a customer with 
        // the ID "ANATR", the select operation is canceled and an error message
        // is displayed.
        if (row.Cells[1].Text == "ANATR")
        {
 
            e.Cancel = true;
            TextBox1.Text = "You cannot select " + row.Cells[2].Text + ".";
 
        }
 
    }
 
 
    protected void GridView1_RowUpdating(object sender, GridViewUpdateEventArgs e)
    {
        TextBox txtsoftwareRequirementId = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtsoftwareRequirementId");
        TextBox txtprojectId = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtprojectId");
        TextBox txtsection = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtsection");
        //DropDownList cmbsection = (DropDownList)GridView1.Rows[e.RowIndex].FindControl("cmbsection");
        TextBox txtrowNumber = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtrowNumber");
        TextBox txtsoftwareRequirement = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtsoftwareRequirement");
        TextBox txtisTraced = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtisTraced");
        TextBox txtimage = (TextBox)GridView1.Rows[e.RowIndex].FindControl("txtimage");
 
        softwareRequirements.Update(Convert.ToInt32(GridView1.DataKeys[e.RowIndex].Values[0].ToString()), projectId, txtsection.Text, txtrowNumber.Text, txtsoftwareRequirement.Text, txtisTraced.Text, txtimage.Text);
        GridView1.EditIndex = -1;
        FillSoftwareRequirementsInGrid();
    }
 
 
    protected void Button1_Click(object sender, EventArgs e)
    {
 
        HtmlDocument doc = new HtmlDocument("1");
        doc.printDocument();
 
    }
}

Bonjour,

Ta cellule correspond à un Template donc contient plusieurs contrôles. Deux solutions : appeller un FindControl (voire FindControl récursif) à partir de ta cellule pour trouver le contrôle désiré. Ou bien simplement, mais c'est moins conseillé, utiliser l'index du contrôle désiré, genre : row.Cells[2][1] .Text.

En espérant t'avoir aidé.

Pour ta première recommendation, c'est exactement ce que j'utilise (voir mon code en haut, 2e ligne).

Pour ta 2e, je l'ai utilisé mais l'objet récupéré est vide aussi.

J'ai constaté que plusieurs personnes avaient le même problème sur le Web mais je n'ai pas encore vu la solution. Serait-ce un problème avec .Net?

Code:

1 2 3 4 5 protected void GridView1_SelectedIndexChanged(Object sender, EventArgs e) { GridViewRow row = GridView1.SelectedRow; string message = "You selected " + row.Cells[2].Text + "."; }
Je ne vois pas de FindControl ici. De plus, Cells[2] correspond à la troisième colonne de ta GridView, c'est à dire un bouton...

Donc un FindControl récursif devrait suffire. Au pire, tu peux toujours mettre un breakpoint et regarder avec le débuggeur où se situe le contrôle que tu veux (quelle cellule).

Et non ce n'est pas un problème .NET :mouarf:

En espérant t'avoir aidé.

methode FindControl

Salut,

Essayer le code suivant :

Code:

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protected void GridView1_SelectedIndexChanged(Object sender, EventArgs e)
    {
        GridViewRow row = GridView1.SelectedRow;
     Button message = "You selected a " + ((Button)row.FindControl("Link")).Text + ".";
    }

Nicholas,

L'exemple avev FindControl() n'est pas indiqué dans ce thread mais voici ce que j'ai dans mon application et ca ne fonctionne pas non plus.

Code:

Control myControl = GridView1.Rows[e.NewSelectedIndex].FinControl("txtSoftwareRequirementid");

Notez que que e.NewSelectedIndex donne le bon index mais que l'objet Control récupéré est Null.

Pour la cellule #3 donc tu parlais, je n'ai plus de bouton, seulement un textbox. De toute façon j'ai essayé toute les cellules..sans succès.

souloff

Ton code ne compile pas.